RawLow Mountain Works Cocoon Pack Tarmac RawLow Mountain Works Cocoon Pack Backpack I used this for commuting for about two days, but it wasn't suitable for commuting with few items because it has no internal pockets. So, I've kept it in the closet. Specifications: The Cocoon Pack is an ultra-lightweight backpack with a capacity of 2-14L and weighs only 190g. Conventional simple backpacks, such as attack packs, often have issues with their form, design, usability, and comfort. This product adjusts those aspects in a way that is characteristic of RLMW. The material used is 30D CODURA silnylon from Invista, the same as the Nuts Pack.